[pciavald@HomeServer ~]$ sudo btrfs filesystem show /dev/sdb
Label: 'data'  uuid: 1ea7ff96-0c60-46c3-869c-ae398cd106a8
        Total devices 7 FS bytes used 4.16TiB
        devid    3 size 2.73TiB used 2.65TiB path /dev/sdd
        devid    4 size 465.73GiB used 381.00GiB path /dev/sde
        devid    5 size 931.48GiB used 847.00GiB path /dev/sdi
        devid    6 size 2.73TiB used 2.65TiB path /dev/sdb
        devid    7 size 931.48GiB used 847.00GiB path /dev/sdc
        devid    8 size 931.48GiB used 847.00GiB path /dev/sdg
        devid    9 size 931.48GiB used 352.03GiB path /dev/sdh